Hi, I am having problem getting the right amount of bytes from the EEprom. Below is a snip of the code that I am trying to run. char heatSched[232]; char coolSched[232]; void setup() { EEPROM.get(0, heatSched); Serial.printlnf("heatSched (from setup) is: %s", heatSched); Serial.pri…

The output is a print out after I did an EEPROM.clear(). I am expecting 232 byte length of non printable char for both variables. But as you can see heatSched length is 233 vs coolSched length is 232. So I am puzzle.

Even when I fill both buf with data it still give me 233 byte for heatSched. C:\WINDOWS\system32>particle serial monitor Opening serial monitor for com port: "COM3" System firmware version: 0.6.0 heatSched (from setup) is: ��…

Hmm… I get 233 for both lengths when I run your code, but if actually count the number of those symbols, I get 232.

That is perfectly normal IMHO. [image] sheng: do I still need a zero terminated if I use particle.publish() ? The arg is a String. As I said String looks for a zero-terminator. If your buffer doesn't contain one the String will expand as long as it needs to find that terminating '/0'. To u…

@Ric , yes, the symbols is correct but why when I print the length its getting an extra byte. @ScruffR , what is perfectly normal? The bigger problem is I notice some of my other variable is changing by itself. When I search on forums, it said maybe do to address corruption so I am trying to locate …

In order to see what I mean try this first char zero = '\0'; char a[8] = { 'a','b','c','d','e','f','g','h'}; char i[8] = { 'i','j','k','l','m','n','o','p'}; char q[8] = { 'q','r','s','t','u','v','w','x'}; char z = 'z'; String A = String(a); String I = String(i); String Q = String(q); Serial.print…

@ScruffR , Char zero and Char z is extra right? I ran both cases with it and without it and got the same result. The only thing I notice from the above example is the extra byte of buf in the second case. I got the result of length of 8 for the three buf in the second case. The first case I got …

The results sound somewhat right (for locals the results are less predictable than for globals), although I expected slightly different numbers for case 1 (25, 17, 9 on a clean stack). But are you not puzzled about these "unexpected" lengths. Have you also looked at the printed strings? Although w…

@ScruffR , when I first ran your example I was puzzled and it was interesting to see it on the screen. This could explain why one of my other variable is changing automatically at random values. It maybe due to the array overflow. To counter this issue, should I add ‘/0’ to the data being send fro…

char arrays are not automatically null-terminated char myArray[232]; // not null terminated but string literals are: char myArray[232] = ""; // null terminated

EEprom get function not getting the right amount of bytes?

Firmware

sheng February 16, 2017, 8:11pm 24

@peekay123, @ScruffR, I definitely learn my lesson on this one. Thank you all for helping out.

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EEprom get function not getting the right amount of bytes?

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